JPH0533043A - Method for controlling uniform combustion in longitudinal direction of steel material - Google Patents
Method for controlling uniform combustion in longitudinal direction of steel materialInfo
- Publication number
- JPH0533043A JPH0533043A JP21033391A JP21033391A JPH0533043A JP H0533043 A JPH0533043 A JP H0533043A JP 21033391 A JP21033391 A JP 21033391A JP 21033391 A JP21033391 A JP 21033391A JP H0533043 A JPH0533043 A JP H0533043A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- burner
- angle
- steel material
- burners
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Combustion (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は直火式加熱炉による鋼
材の加熱方法における加熱炉抽出時の鋼材温度分布の均
一化と燃料原単位の低減をはかるための燃焼制御方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion control method for homogenizing a temperature distribution of a steel material and reducing a fuel consumption rate when extracting a heating furnace in a method for heating a steel material by a direct-fired heating furnace.
【０００２】[0002]
【従来の技術】バーナーを炉幅方向に複数配設した直火
式サイドバーナー加熱炉においては、品質および省エネ
対策の観点から加熱炉抽出時における被加熱材の温度分
布を均一にすることが重要である。従来、加熱炉抽出時
の被加熱材温度分布を均一にする燃焼制御方法として、
前記サイドバーナーの燃料流量を調整する燃焼制御方法
が実施されている。すなわち、加熱炉に装入される鋼材
は長さが不均一であるため、鋼材が短い場合には当該材
料の長さに対応しない箇所のバーナーの燃料流量を絞っ
て過剰加熱を抑制し、また鋼材長手方向の温度分布が不
均一の場合には、その鋼材の目標温度に対し低温部側の
温度を上昇させるようバーナーの燃料流量を調整し、高
温部側の温度を下降させるようバーナーの燃料流量を調
整することで燃焼制御を行っている。その結果、鋼材の
長手方向温度の最小値と最大値の差、つまり長手方向温
度偏差が少なくなるように制御されている。2. Description of the Related Art In a direct-fired side burner heating furnace having a plurality of burners arranged in the width direction of the furnace, it is important to make the temperature distribution of the material to be heated uniform during extraction of the heating furnace from the viewpoint of quality and energy saving measures. Is. Conventionally, as a combustion control method for making the temperature distribution of the material to be heated uniform when extracting the heating furnace,
A combustion control method for adjusting the fuel flow rate of the side burner is implemented. That is, since the length of the steel material charged into the heating furnace is non-uniform, when the steel material is short, the fuel flow rate of the burner at a portion not corresponding to the length of the material is reduced to suppress excessive heating, and If the temperature distribution in the longitudinal direction of the steel material is not uniform, the fuel flow rate of the burner is adjusted so that the temperature on the low temperature side rises with respect to the target temperature of the steel material, and the fuel on the burner is lowered to decrease the temperature on the high temperature side. Combustion control is performed by adjusting the flow rate. As a result, the difference between the minimum value and the maximum value of the temperature in the longitudinal direction of the steel material, that is, the temperature deviation in the longitudinal direction is controlled to be small.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の鋼材加
熱炉におけるサイドバーナーは、火炎の向き等バーナー
角度の調整が全くできない構造となっているため、サイ
ドバーナーの燃料流量を調整して燃焼制御を行う従来の
方法では、各バーナー間に対応する鋼材温度とバーナー
部に対応する鋼材温度とを均一に保持することが困難で
あった。すなわち、各バーナー間に対応する部分はバー
ナー部に対応する部分に比べて温度が低くなり、それが
鋼材温度分布の不均一の原因となっているのである。ま
た、サイドバーナーが固定式であるため被加熱材との距
離は常に一定であり、バーナー火炎を被加熱材に近付け
ることができないため燃料原単位を低減することができ
なかった。However, since the side burner in the conventional steel heating furnace has a structure in which the burner angle such as the direction of the flame cannot be adjusted at all, the combustion control is performed by adjusting the fuel flow rate of the side burner. In the conventional method of performing the above, it was difficult to uniformly maintain the steel material temperature corresponding to each burner and the steel material temperature corresponding to the burner portion. That is, the temperature of the portion corresponding to each burner is lower than that of the portion corresponding to the burner portion, which causes non-uniformity of the steel material temperature distribution. Further, since the side burner is a fixed type, the distance to the material to be heated is always constant, and the burner flame cannot be brought close to the material to be heated, so that the fuel consumption rate cannot be reduced.
【０００４】この発明は従来の前記実状に鑑み、鋼材の
長手方向温度偏差を縮小し温度分布の均一化をはかると
ともに、燃料原単位を低減できる加熱炉の燃焼制御方法
を提案しようとするものである。In view of the conventional situation described above, the present invention proposes a combustion control method for a heating furnace which can reduce the temperature deviation in the longitudinal direction of the steel material to make the temperature distribution uniform and reduce the fuel consumption rate. is there.
【０００５】[0005]
【課題を解決するための手段】この発明の要旨は、バー
ナーを炉幅方向に複数配設した直火式サイドバーナー加
熱炉において、サイドバーナーの角度を各々独立に調整
可能となし、炉内における被加熱材の位置および長さと
炉幅方向温度分布に基づいて前記サイドバーナーの角度
を調整する方法と、この角度調整に加えて各バーナーの
燃料流量を制御する方法によって加熱炉抽出時の鋼材温
度分布を均一にすること、および被加熱材の位置および
長さと炉幅方向温度分布に基づいてサイドバーナーの上
下方向角度を調整して燃料原単位を低減することにあ
る。DISCLOSURE OF THE INVENTION The gist of the present invention is that in a direct-fired side burner heating furnace in which a plurality of burners are arranged in the width direction of the furnace, the angles of the side burners can be independently adjusted. Method of adjusting the angle of the side burner based on the position and length of the material to be heated and the furnace width direction temperature distribution, and the steel material temperature at the time of extracting the heating furnace by the method of controlling the fuel flow rate of each burner in addition to this angle adjustment It is to make the distribution uniform and to reduce the fuel consumption rate by adjusting the vertical angle of the side burner based on the position and length of the material to be heated and the temperature distribution in the furnace width direction.
【０００６】[0006]
【作用】直火式加熱炉におけるサイドバーナーは、それ
ぞれ独立に上下方向および水平方向に角度調整可能に取
付けられており、その角度調整装置は例えばプロセスコ
ンピューター等の演算制御装置により制御される。その
制御方法としては、加熱炉に装入される被加熱材の長
さ、炉内位置情報から事前にバーナー角度を調整するフ
ィードフォワード制御、および抽出時の鋼材温度分布実
測値から次鋼材に対するバーナー角度、燃料流量を調整
するフィードバック制御により行う。かかる制御により
加熱炉抽出時の長手方向温度の最大値と最小値の差、つ
まり長手方向温度偏差を縮小できる。また、サイドバー
ナーの角度を上下に調整することにより、被加熱材に近
いところでバーナーを燃焼させることが可能となり、燃
料原単位を低減させることができる。The side burners in the direct-fired heating furnace are independently mounted so that the angles can be adjusted in the vertical and horizontal directions, and the angle adjusting device is controlled by an arithmetic and control unit such as a process computer. As the control method, the length of the material to be charged into the heating furnace, feed-forward control that adjusts the burner angle in advance from the position information in the furnace, and the burner for the next steel material from the actual measured value of the steel material temperature distribution during extraction This is performed by feedback control that adjusts the angle and fuel flow rate. By such control, the difference between the maximum value and the minimum value of the temperature in the longitudinal direction at the time of extracting the heating furnace, that is, the temperature deviation in the longitudinal direction can be reduced. Further, by adjusting the angle of the side burner up and down, it becomes possible to burn the burner near the material to be heated, and it is possible to reduce the fuel consumption rate.
【０００７】[0007]
【実施例】図１はこの発明に係る加熱炉幅方向（鋼材長
手方向）均一燃焼制御システムの構成例を示す概略平面
図、図２は同上制御システムの概略側面図である。なお
ここでは、サイドバーナーが３本の直火式サイドバーナ
ー加熱炉を例にとり説明する。図中、１は炉体、２は鋼
材、３−１〜３−３はサイドバーナー、４−１〜４−３
はバーナー角度調整装置、５−１〜５−３は燃料流量調
整弁、６は演算制御装置である。Ｌは鋼材の長さ
（ｍ）、ｌ1、ｌ2は鋼材と炉壁との距離（ｍ）を示す。1 is a schematic plan view showing a structural example of a uniform combustion control system for a heating furnace in the width direction (longitudinal direction of steel material) according to the present invention, and FIG. 2 is a schematic side view of the control system. An example of a direct-fired side burner heating furnace with three side burners will be described here. In the figure, 1 is a furnace body, 2 is a steel material, 3-1 to 3-3 are side burners, and 4-1 to 4-3.
Is a burner angle adjusting device, 5-1 to 5-3 are fuel flow rate adjusting valves, and 6 is an arithmetic and control unit. L represents the length of the steel material (m), l 1 and l 2 represent the distance (m) between the steel material and the furnace wall.
【０００８】サイドバーナー３−１〜３−３はバーナー
角度調整装置４−１〜４−３により上下および左右方向
に角度を調整できるように設置されている。角度調整手
段としては、例えば二つの台をそれぞれ独立して上下方
向と左右方向に動くように組合わせ、それぞれの台をモ
ーターあるいはシリンダーにて駆動するようにした可動
台にバーナー本体を取付ける方式を用いることができ
る。演算制御装置６には、例えばプロセスコンピュータ
ーを用いる。The side burners 3-1 to 3-3 are installed so that the angles can be adjusted vertically and horizontally by the burner angle adjusting devices 4-1 to 4-3. As an angle adjusting means, for example, a method of attaching two burners independently to each other so that they can move vertically and horizontally, and mounting the burner body on a movable table that is driven by a motor or a cylinder. Can be used. For the arithmetic and control unit 6, for example, a process computer is used.
【０００９】上記構成の燃焼制御システムにおいて、ま
ず演算制御装置６に鋼材２の炉内位置、長さ、バーナー
角度および炉幅方向温度分布情報を与えておく。この発
明では、演算制御装置６により両側のバーナー３−１、
３−３の水平方向のバーナ角度θ1、θ3を、鋼材２の炉
内位置ｌ1、ｌ2、長さＬ、中央のバーナー３−２のバー
ナー角度θ2、炉幅方向温度分布Ｔの関数として求め
る。中央のバーナー３−２のバーナー角度θ2は、その
両側のバーナー角度θ1、θ3の因子を追加することによ
り求める。このようにして各サイドバーナー３−１〜３
−３のバーナー角度が求まると、演算制御装置６より各
サイドバーナーの角度調整装置４−１〜４−３が制御さ
れ、所定のバーナー角度に設定される。また、バーナー
角度調整とバーナー燃料流量の制御とを組合わせる場合
は、各サイドーバーナー３−１〜３−３の角度を調整す
ると同時に、燃料流量を炉幅方向温度分布Ｔにより求
め、各バーナーの燃料流量調整弁５−１、５−２、５−
３を調整する。さらに、各サイドバーナーの上下方向の
角度θｉを調整する場合は、演算制御装置６により鋼材
の長さ、位置、炉幅方向温度分布に基づいて各サイドバ
ーナーの上下方向の角度θｉを求め、角度調整装置４−
１〜４−３により上下方向角度θｉを調整する。In the combustion control system having the above-mentioned structure, first, the arithmetic and control unit 6 is provided with the in-furnace position, length, burner angle, and temperature distribution information in the furnace width direction of the steel material 2. In the present invention, the arithmetic and control unit 6 controls the burners 3-1 on both sides,
The horizontal burner angles θ 1 and θ 3 of 3-3 are the furnace positions l 1 and l 2 of the steel material 2 , the length L, the burner angle θ 2 of the central burner 3-2, and the furnace width direction temperature distribution T. As a function of. The burner angle θ 2 of the central burner 3-2 is obtained by adding the factors of the burner angles θ 1 and θ 3 on both sides thereof. In this way each side burner 3-1 to 3
When the burner angle of -3 is obtained, the arithmetic and control unit 6 controls the angle adjusting units 4-1 to 4-3 of the respective side burners to set a predetermined burner angle. When the burner angle adjustment and the control of the burner fuel flow rate are combined, the angle of each side burner 3-1 to 3-3 is adjusted, and at the same time, the fuel flow rate is obtained from the furnace width direction temperature distribution T and each burner is calculated. Fuel flow rate adjusting valves 5-1, 5-2, 5-
Adjust 3. Further, when the vertical angle θi of each side burner is adjusted, the vertical angle θi of each side burner is calculated by the arithmetic and control unit 6 based on the length, position, and temperature distribution in the furnace width direction of the steel material. Adjusting device 4-
The vertical angle θi is adjusted by 1 to 4-3.
【００１０】[0010]
【実施例１】表１に示す諸元の鋼材加熱炉にこの発明方
法を適用し、表２に示す操業条件で鋼材温度分布制御を
行った結果、従来炉幅方向温度偏差が４１℃であったの
が、この発明法により炉幅方向温度偏差が２１℃に縮小
された。また、燃料原単位は従来に比べて３％低減され
た。Example 1 The method of the present invention was applied to a steel material heating furnace having the specifications shown in Table 1, and the steel material temperature distribution was controlled under the operating conditions shown in Table 2. As a result, the conventional furnace width direction temperature deviation was 41 ° C. However, the temperature deviation in the furnace width direction was reduced to 21 ° C. by the method of the present invention. In addition, the fuel consumption rate was reduced by 3% compared to the conventional one.
【００１１】[0011]
【表１】 [Table 1]
【００１２】[0012]
【表２】 [Table 2]
【００１３】[0013]
【発明の効果】以上説明したごとく、この発明方法によ
れば、炉内鋼材の位置、長さおよび温度分布に応じてサ
イドバーナーの角度を設定できるので、各バーナー間と
バーナー部に対応する部分間に温度差が生じないように
燃焼制御することができ、鋼材の長手方向温度分布の均
一化が可能となる。また、燃焼効率の向上によりバーナ
ー燃料の低減がはかられ、鋼材の長手方向均一燃焼制御
方法として極めて有用性に富むものである。As described above, according to the method of the present invention, the angle of the side burner can be set according to the position, length and temperature distribution of the steel material in the furnace, so that a portion between the burners and a portion corresponding to the burner portion can be set. Combustion can be controlled so that no temperature difference occurs between them, and the temperature distribution in the longitudinal direction of the steel material can be made uniform. Further, since the burner fuel can be reduced by improving the combustion efficiency, it is extremely useful as a method for controlling the uniform combustion of steel in the longitudinal direction.
【図面の簡単な説明】[Brief description of drawings]
【図１】この発明に係る加熱炉幅方向均一燃焼制御シス
テムの構成例を示す概略平面図である。FIG. 1 is a schematic plan view showing a configuration example of a heating furnace widthwise uniform combustion control system according to the present invention.
【図２】同上制御システムの概略側面図である。FIG. 2 is a schematic side view of the same control system.
１ 炉体 ２ 鋼材 ３−１〜３−３ サイドバーナー ４−１〜４−３ バーナー角度調整装置 ５−１〜５−３ 燃料流量調整弁 ６ 演算制御装置 1 furnace body 2 steel 3-1-3-3 Side burner 4-1 to 4-3 burner angle adjusting device 5-1-5-3 Fuel flow rate adjustment valve 6 arithmetic and control unit
Claims (3)
式サイドバーナー加熱炉において、サイドバーナーの角
度を各々独立に調整可能となし、炉内における被加熱材
の位置および長さと炉幅方向温度分布に基づいて前記サ
イドバーナーの角度を調整することを特徴とする鋼材長
手方向均一燃焼制御方法。1. In a direct-fire side-burner heating furnace in which a plurality of burners are arranged in the width direction of the furnace, the angles of the side burners can be independently adjusted, and the position and length of the material to be heated in the furnace and the width of the furnace. A method for uniformly controlling combustion in the longitudinal direction of a steel material, which comprises adjusting the angle of the side burner based on the directional temperature distribution.
式サイドバーナー加熱炉において、サイドバーナーの角
度を各々独立に調整可能となし、炉内における被加熱材
の位置および長さと炉幅方向温度分布に基づいて前記サ
イドバーナーの角度を調整するとともに、各サイドバー
ナーの燃料流量を制御することを特徴とする鋼材長手方
向均一燃焼制御方法。2. A direct-fired side burner heating furnace having a plurality of burners arranged in the width direction of the furnace, wherein the angles of the side burners can be independently adjusted, and the position and length of the material to be heated in the furnace and the width of the furnace. A method for uniformly controlling combustion in the longitudinal direction of a steel product, which comprises adjusting the angle of the side burner based on the directional temperature distribution and controlling the fuel flow rate of each side burner.
式サイドバーナー加熱炉において、炉内における被加熱
材の位置および長さと炉幅方向温度分布に基づいてサイ
ドバーナーの上下方向角度を調整することを特徴とする
鋼材長手方向均一燃焼制御方法。3. In a direct-fired side burner heating furnace in which a plurality of burners are arranged in the furnace width direction, the vertical angle of the side burner is determined based on the position and length of the material to be heated in the furnace and the temperature distribution in the furnace width direction. A method for uniformly controlling combustion in a longitudinal direction of a steel material, the method comprising: adjusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21033391A JPH0533043A (en) | 1991-07-26 | 1991-07-26 | Method for controlling uniform combustion in longitudinal direction of steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21033391A JPH0533043A (en) | 1991-07-26 | 1991-07-26 | Method for controlling uniform combustion in longitudinal direction of steel material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0533043A true JPH0533043A (en) | 1993-02-09 |
Family
ID=16587681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21033391A Pending JPH0533043A (en) | 1991-07-26 | 1991-07-26 | Method for controlling uniform combustion in longitudinal direction of steel material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0533043A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010117784A3 (en) * | 2009-03-31 | 2011-01-13 | Uop Llc | Adjustable burners for heaters |
| KR101538840B1 (en) * | 2013-03-18 | 2015-07-29 | 주식회사 포스코 | Batch type annealing furnace |
| JP2015165180A (en) * | 2014-02-28 | 2015-09-17 | エア プロダクツ アンド ケミカルズ インコーポレイテッドＡｉｒ Ｐｒｏｄｕｃｔｓ Ａｎｄ Ｃｈｅｍｉｃａｌｓ Ｉｎｃｏｒｐｏｒａｔｅｄ | transient heating burner and transient heating method |
| KR20150113425A (en) * | 2014-03-28 | 2015-10-08 | 현대제철 주식회사 | Oxygen lancing combustion apparauts and method for controlling the same |
-
1991
- 1991-07-26 JP JP21033391A patent/JPH0533043A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010117784A3 (en) * | 2009-03-31 | 2011-01-13 | Uop Llc | Adjustable burners for heaters |
| RU2484368C1 (en) * | 2009-03-31 | 2013-06-10 | Юоп Ллк | Adjustable burners for heaters |
| KR101538840B1 (en) * | 2013-03-18 | 2015-07-29 | 주식회사 포스코 | Batch type annealing furnace |
| JP2015165180A (en) * | 2014-02-28 | 2015-09-17 | エア プロダクツ アンド ケミカルズ インコーポレイテッドＡｉｒ Ｐｒｏｄｕｃｔｓ Ａｎｄ Ｃｈｅｍｉｃａｌｓ Ｉｎｃｏｒｐｏｒａｔｅｄ | transient heating burner and transient heating method |
| US9976741B2 (en) | 2014-02-28 | 2018-05-22 | Air Products And Chemicals, Inc. | Transient heating burner and method |
| KR20150113425A (en) * | 2014-03-28 | 2015-10-08 | 현대제철 주식회사 | Oxygen lancing combustion apparauts and method for controlling the same |
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